/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | foam-extend: Open Source CFD
   \\    /   O peration     | Version:     4.1
    \\  /    A nd           | Web:         http://www.foam-extend.org
     \\/     M anipulation  | For copyright notice see file Copyright
-------------------------------------------------------------------------------
License
	This file is part of foam-extend.

	foam-extend is free software: you can redistribute it and/or modify it
	under the terms of the GNU General Public License as published by the
	Free Software Foundation, either version 3 of the License, or (at your
	option) any later version.

	foam-extend is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
	General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with foam-extend.  If not, see <http://www.gnu.org/licenses/>.

\*---------------------------------------------------------------------------*/

#include "objectRegistry.H"
#include "AC3DsurfaceFormatCore.H"
#include "clock.H"
#include "IFstream.H"
#include "IStringStream.H"

// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //

bool Foam::fileFormats::AC3DsurfaceFormatCore::readCmd
(
	IFstream& is,
	string& cmd,
	string& args
)
{
	if (is.good())
	{
		string line;
		is.getLine(line);

		string::size_type space = line.find(' ');

		if (space != string::npos)
		{
			cmd  = line.substr(0, space);
			args = line.substr(space+1);

			return true;
		}
	}
	return false;
}


// Read up to line starting with cmd. Sets args to rest of line.
// Returns true if found, false if stream is not good anymore.
bool Foam::fileFormats::AC3DsurfaceFormatCore::cueTo
(
	IFstream& is,
	const string& cmd,
	string& args
)
{
	while (is.good())
	{
		string line;
		is.getLine(line);

		string::size_type space = line.find(' ');

		if (space != string::npos)
		{
			if (line.substr(0, space) == cmd)
			{
				args = line.substr(space+1);

				return true;
			}
		}
	}
	return false;
}


// Similar to cueTo(), but throws error if cmd not found
Foam::string Foam::fileFormats::AC3DsurfaceFormatCore::cueToOrDie
(
	IFstream& is,
	const string& cmd,
	const string& errorMsg
)
{
	string args;
	if (!cueTo(is, cmd, args))
	{
		FatalErrorIn
		(
			"fileFormats::AC3DsurfaceFormat::read(const fileName&)"
		)
			<< "Cannot find command " << cmd
			<< " " << errorMsg
			<< exit(FatalError);
	}

	return args;
}


void Foam::fileFormats::AC3DsurfaceFormatCore::writeHeader
(
	Ostream& os,
	const UList<surfZone>& zoneLst
)
{
	// Write with zones as separate objects under "world" object.
	// Header is taken over from sample file.
	// Defines separate materials for all zones. Recycle colours.

	// Define 8 standard colours as r,g,b components
	static scalar colourMap[] =
	{
		1, 1, 1,
		1, 0, 0,
		0, 1, 0,
		0, 0, 1,
		1, 1, 0,
		0, 1, 1,
		1, 0, 1,
		0.5, 0.5, 1
	};

	// Write header. Define materials.
	os  << "AC3Db" << nl;

	forAll(zoneLst, zoneI)
	{
		label colourI = zoneI % 8;
		label colourCompI = 3 * colourI;

		os  << "MATERIAL \"" << zoneLst[zoneI].name() << "Mat\" rgb "
			<< colourMap[colourCompI] << ' ' << colourMap[colourCompI+1]
			<< ' ' << colourMap[colourCompI+2]
			<< "  amb 0.2 0.2 0.2  emis 0 0 0  spec 0.5 0.5 0.5  shi 10"
			<< "  trans 0"
			<< nl;
	}

	os  << "OBJECT world" << nl
		<< "kids " << zoneLst.size() << endl;
}


// ************************************************************************* //
